1+2∧1+2∧2+2∧3+...+2∧n-1等于?
1+2∧1+2∧2+2∧3+...+2∧n-1等于?
1+2∧1+2∧2+2∧3+...+2∧n-1等于?
1+2∧1+2∧2+2∧3+...+2∧n-1等于?
2^n-1
(2^n)-1过程这是等比数列,要过程吗恩为什么
1+2∧1+2∧2+2∧3+...+2∧n-1等于?
1+2∧1+2∧2+2∧3+...+2∧n-1等于?
1+2∧1+2∧2+2∧3+...+2∧n-1等于?
2^n-1
(2^n)-1过程这是等比数列,要过程吗恩为什么